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Bogons Info Active Bogons Bogon IP Lists Using IP Lists Exceptions Data Analysis Project News

Bogons is the name used to describe ip blocks not allocated by IANA and RIRs to ISPs and organizations plus all other ip blocks that are reserved for private or special use by RFCs (the actual term "bogons" comes from word "bogus", as in bogus ip announcements). As these ip blocks are not allocated or specially reserved, such ip blocks should not be routable and used on the internet, however some of these ip blocks do appear on the net primarily used by those individuals and organizations that are often specifically trying to avoid being identified and are often involved in such activities as DoS attacks, email abuse, hacking and other security problems. These activities obviously pose great danger to everyone and ISPs should try to filter all these bad ip routes and we are trying to help in that by working to create complete detailed list of unassigned bogon ips based on whois data.

Completewhois has developed a system that can track changes for all RIRs (we use whois database for ARIN, RIPE, APNIC and allocation statistics data for LACNIC), and on daily basis we produce new list of allocated and unallocated blocks and check if any unallocated blocks are in active use on the internet. All this data is available in several formats, the most often used ones are below, for all other lists please see BOGONS IP LISTS page:

List of all BOGON IPs in Netrange format  (example: 10.0.0.0 - 10.255.255.255) 
List of all BOGON IPs in CIDR Bit Notation format  (example: 10.0.0.0/8)
List of all BOGON IPs in CIDR Netmask format
  (example: 10.0.0.0/255.0.0.0)
List of all BOGON IPs in Dotted Decimal format (example: 10.0.0.0  255.0.0.0)

All currently routed (bgp announced) IP Blocks that are in our Bogon IPs List

We also provide access to bogons data by other means such as through dns lists (similar to rbl server) and in the future are planning to provide this data through special BGP community for those peering with our server and through whois routing database, for more information please see here.

Its possible that our scripts may produce errors or just as likely that whois information in RIR that we use is not correct, so if your know ip block that incorrectly listed please fill this form to request a correction in our bogons data. Exceptions may also be granted for some internet experiments and testing done by well known experts. In all such cases we require valid contact information about user of the ip block and keep this available to public on this page.

With part of bogon ip data gathering process we also keep track of exactly how much space is allocated for each /8 block and how much of that is in active use on the net. These allocation statistics with each /8 netblock listed individually are available here.

If you would like to learn more about bogons, please check these sites for more information:

Pataroo CIDR Report Announced Bogons - http://bgp.potaroo.net/cidr/#Bogons 

Netatlantis Announced Bogons List - http://www.netlantis.org/index.html?menu=2&page=listbogon 

Bogon Presentatoin by Geoff Huston on RIPE meeting:
http://www.ripe.net/ripe/meetings/ripe-45/presentations/ripe45-eof-geoff.pdf

Bogon Route Servers page maintained by SixXS: http://www.sixxs.net/tools/brs/ 
and also their bogons information page: http://www.sixxs.net/tools/grh/bogons/ 

APNIC BGP Statistics (see bogus routes under it) - http://www.apnic.net/stats/bgp/ 

RF330 "Special-Use IPv4 Addresses" - ftp://ftp.rfc-editor.org/in-notes/rfc3330.txt 

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Last modified: October 18, 2003